Home / 15,857.55-21,898.11-11,871.74

Finding the Fourth Proportional to 15,857.55, 21,898.11 and 11,871.74

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Solution

The fourth proportional to 15,857.55, 21,898.11 and 11,871.74 is: 16,393.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.55 : 21,898.11 = 11,871.74 : x
  2. Step 2: Convert to fraction form
    15,857.55/21,898.11 = 11,871.74/x
  3. Step 3: Cross multiply
    15,857.55x = 21,898.11 × 11,871.74
  4. Step 4: Simplify right side
    15,857.55x = 259,968,558.92
  5. Step 5: Solve for x
    x = 259,968,558.92/15,857.55
  6. Step 6: Final answer
    x = 16,393.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.